<template>
    <el-menu default-active="1-4-1" class="el-menu-vertical-demo" background-color="#545c64" text-color="#fff" active-text-color="#ffd04b" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
       <h3>{{isCollapse ? '后台' :'通用后台管理系统'}}</h3>
       <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :index="item.path" :key="item.path">
            <i :class="'el-icon-'+item.icon"></i>
            <span slot="title">{{item.label}}</span>
       </el-menu-item>

      <el-submenu v-for="item in hasChildren" :index="item.path" :key="item.path">
            <template slot="title">
                <i :class="'el-icon-'+item.icon"></i>
                <span slot="title">{{item.label}}</span>
            </template>
            <el-menu-item-group v-for="(subItem, subIndex) in item.children" :key="subItem.path">
                <el-menu-item @click="clickMenu(subItem)" :index="subIndex">{{subItem.label}}</el-menu-item>
            </el-menu-item-group>
      </el-submenu>
    </el-menu>
</template>

<style lang="less" scoped>
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
  .el-menu{
      height: 105vh;
      border: none;
      h3{
          color:#fff;
          text-align:center;
          line-height:48px
      }
  }
</style>

<script>
  export default {
    data() {
      return {
     //   isCollapse: true,
        menu:[
            {
              path:'/',
              name:'home',
              label:'首页',
              icon:'s-home',
              url:'Home/Home'
            },
            {
              path:'/mall',
              name:'mall',
              label:'商品管理',
              icon:'video-play',
              url:'MallManage/MallManage'
            },
            {
              path:'/user',
              name:'user',
              label:'用户管理',
              icon:'user',
              url:'UserManage/UserManage'
            },
            {
              label:'其他',
              icon:'location',
              children:[
                {
                    path:'/page1',
                    name:'page1',
                    label:'页面1',
                    icon:'setting',
                    url:'Other/PageOne'
                },
                {
                    path:'/page2',
                    name:'page2',
                    label:'页面2',
                    icon:'setting',
                    url:'Other/PageTwo'
                },
              ]
            },
        ]
      };
    },
    methods: {
      handleOpen(key, keyPath) {
        console.log(key, keyPath);
      },
      handleClose(key, keyPath) {
        console.log(key, keyPath);
      },
      clickMenu(item){
          this.$router.push({
              name:item.name
          })
          this.$store.commit('selectMenu',item)
      }
    },
    computed:{
        noChildren(){
            return this.menu.filter(item => !item.children)
        },
        hasChildren(){
            return this.menu.filter(item => item.children)
        },
        isCollapse(){
          return this.$store.state.tab.isCollapse
        }
    }
  }
</script>